Discordant Metronomes on a Movable Surface

So at first glance this sounds dumb. What is this post about? Well, since I can't get embed to work still, go watch this video.

If you're really too lazy to watch a youtube video, here's what it is: 32 metronomes all set to the same tempo (beat) but started at different times. Sounds simple. If they were on a static surface like a table, they would remain discordant forever. But that's boring. So they put the metronomes on a movable surface, and voila, they synchronized with each other.

How does this work? Well, by reading up about it, I have gained total knowledge of this situation. If by total knowledge you mean I have no idea. It seems like the motion of one metronome transmits magical energy waves through the movable surface to each other via some thermal conductivity and sound wave shtick. I don't understand it too much, but the idea is cool. The sound waves and oscillation of these each affects all of the others until they all become the same.

Sounds like mainstream society to me (ba dum tss)